| 摘要 |
The invention concerns a method for forming a test channel on a welded joint of one or more plates. The joint is obtained by means of a first, longer plate edge 2 being folded slightly over a second, lower folded edge 1 so that a closed channel 14 is obtained, which channel is sealed either by a seam weld 21, 22 or an explosion weld on each side of the channel. <IMAGE> |
